PCA9554DB
8-bit I²C-bus and SMBus I/O port with interrupt
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The PCA9554 and PCA9554A are 16-pin CMOS devices that provide 8 bits of General Purpose parallel Input/Output (GPIO) expansion for I²C-bus/SMBus applications and were developed to enhance the NXP Semiconductors family of I²C-bus I/O expanders. The improvements include higher drive capability, 5 V I/O tolerance, lower supply current, individual I/O configuration, 400 kHz clock frequency, and smaller packaging. I/O expanders provide a simple solution when additional I/O is needed for ACPI power switches, sensors, push buttons, LEDs, fans, and so on.
The PCA9554/PCA9554A consist of an 8-bit Configuration register (Input or Output selection); 8-bit Input Port register, 8-bit Output Port register and an 8-bit Polarity Inversion register (active HIGH or active LOW operation). The system master can enable the I/Os as either inputs or outputs by writing to the I/O configuration bits. The data for each input or output is kept in the corresponding Input Port or Output Port register. The polarity of the read register can be inverted with the Polarity Inversion register. All registers can be read by the system master. Although pin-to-pin and I²C-bus address compatible with the PCF8574 series, software changes are required due to the enhancements and are discussed in Application Note AN469.
The PCA9554/PCA9554A open-drain interrupt output is activated when any input state differs from its corresponding Input Port register state and is used to indicate to the system master that an input state has changed. The power-on reset sets the registers to their default values and initializes the device state machine.
Three hardware pins (A0, A1, A2) vary the fixed I²C-bus address and allow up to eight devices to share the same I²C-bus/SMBus. The PCA9554A is identical to the PCA9554 except that the fixed I²C-bus address is different allowing up to sixteen of these devices (eight of each) on the same I²C-bus/SMBus.
Features and benefits
- Operating power supply voltage range of 2.3 V to 5.5 V
- 5 V tolerant I/Os
- Polarity Inversion register
- Active LOW interrupt output
- Low standby current
- Noise filter on SCL/SDA inputs
- No glitch on power-up
- Internal power-on reset
- 8 I/O pins which default to 8 inputs
- 0 Hz to 400 kHz clock frequency
- ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101
- Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
- AEC-Q100 compliance available
- Packages offered: DIP16, SO16, SSOP16, SSOP20, TSSOP16, HVQFN16 (2 versions: 4 mm x 4 mm x 0.85 mm and 3 mm x 3 mm x 0.85 mm), and bare die
- Series PCA9554; PCA9554A
8-bit I²C-bus and SMBus I/O port with interrupt
- Parametric search all I2C general purpose I/O
All information on this product information page is subject to the subsequent disclaimers:
Parametrics of this product
| Type number | Package | Number of bits | Source Current per bit(mA) | I2C-bus(kHz) | Operating voltage(VDC) | Weak Pull-Up Current Source | Max Sink Current per bit(mA) | # of Addresses | Max Sink Current, per package(mA) | Enable | Operating Temperature(Cel) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| PCA9554DB | SOT338-1 (SSOP16) | 8 | 10 | 400 | 2.3~5.5 | yes | 25 | 8 | 100 | -40~85 | -40~85 |
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Package
Outline drawing
| Package Version | Package Name | Package Description | Reference Codes | Issue Date |
|---|---|---|---|---|
| SOT338-1 | SSOP16 | plastic shrink small outline package; 16 leads; body width 5.3 mm | MO-150 (JEDEC); | 2003-02-19 |
Quality, reliability & chemical content
| Type number | Orderable part number | Chemical content | RoHS | Leadfree conversion date | RHF | IFR (FIT) | MTBF (hours) | MSL | MSL LF |
|---|---|---|---|---|---|---|---|---|---|
| PCA9554DB | PCA9554DB,118 | PCA9554DB |  | week 12, 2005 |  | 2.0 | 5.0E8 | 1 | 1 |
| PCA9554DB | PCA9554DB,112 | PCA9554DB | | week 12, 2005 | | 2.0 | 5.0E8 | 1 | 1 |
Documentation for this product
| File name | Title | Type | Format | Date |
|---|---|---|---|---|
| PCA9554_9554A | 8-bit I2C-bus and SMBus I/O port with interrupt | Data sheet | 2013-03-19 | |
| AN10441 | Level shifting techniques in I2C-bus design | Application note | 2007-06-20 | |
| AN256 | PCA9500/PCA9501 provides simple card maintenance and control using I²C-bus | Application note | 2009-03-23 | |
| AN469 | I2C/SMBus general purpose I/O expanders | Application note | 2005-01-20 | |
| AN10216 | I2C manual | Application note | 2003-03-27 | |
| AN10148 | PCA9564 - I2C-bus controller | Application note | 2004-11-22 | |
| AN10149 | PCA9564 Evaluation Board | Application note | 2004-08-19 | |
| AN10146 | I2C 2002-1A Evaluation Board | Application note | 2003-02-26 | |
| 75016543 | Create smarter, more efficient white goods; An industry-leading portfolio of cost-effective, power-saving solutions for major home appliances | Brochure | 2008-06-01 | |
| 75016020 | Low-power GPIO expanders for portable applications; NXP 8/16-bit I2C/SMBus GPIO expanders PCA9534/35/35C for low-power applications | Leaflet | 2007-06-01 | |
| 75016535 | Versatile, easy-to-use GPIO expanders; NXP 4/8/16-bit I2C/SMBus GPIO expanders PCA9536/54/54A/55 | Leaflet | 2008-08-01 | |
| 75017238 | Low-power Cortex-M3 based microcontrollers simplify USB designs | Leaflet | 2012-04-13 | |
| 75016531 | Evaluate the I2C-bus with a comprehensive kit; NXP I2C 2002-1A evaluation board kits OM6285 and OM6278 | Leaflet | 2008-07-01 | |
| 75017144 | I2C Selection Guide 2H 2011 | Leaflet | 2011-09-29 | |
| design_con_2003_tecforum_i2c_bus_overview | DesignCon 2003 TecForum I 2 C Bus Overview | Other type | 2003-01-27 | |
| 39340011 | I2C-bus specification (version 2.1) | Other type | 2000-01-01 | |
| UM10204 | I2C-bus specification and user manual | User manual | 2007-06-26 | |
| UM10206 | I2C Demonstration Board 2005-1 Quick Start Guide | User manual | 2006-06-13 | |
| UM10267 | PCA9698 demonstration board OM6281 | User manual | 2008-09-26 | |
| UM10204_JA | I2C-bus specification and user manual | User manual | 2013-04-03 |
Support links
- IBIS and HSPICE Model (standardics.nxp.com/support/tools/)
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